On Mon, 13 Sep 2004, Tamas K Papp wrote: > The fact that as.integer(TRUE) is 1 (and that for FALSE, it gives > zero) is a really nice feature, eg when constructing piecewise > functions (for example, as in -x*(x<0)+x*(x>=0)) and for many other > things. > > Since I haven't found a reference about this, I just wanted to ask > whether this is officialy part of the language or just a side effect > (ie I want to know whether it is here to stay and if it is prudent to > use this).
Well, you are actually using as.numeric(TRUE) there. That is documented to be 1 (and as.numeric(FALSE) to be 0), in the Blue Book p.100. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
